Re: Redundant master servers possible?

Bryan,

I think you've got a good start there.  If I were to do this this is
what I would do.

#1.  Create some master conserver servers.  These servers
     will both connect to all the cosnoles in the organization.
     Anyone could connect to either server.

#2.  Create a replacement or wrapper for console.  This
     could be very easy.  This program would then direct
     the person to the correct server.

Example:

use Net::Ping;
use strict;

sub up {
 my $ip = shift;
 my $p = Net::Ping->new();
 my $result = $p->ping($ip);
 $p->close();
 return $result;
}

# Main part
my $console_name = $ARGV[0];
my @servers = [ "192.168.1.1", "192.168.1.2" ];
foreach(@servers) {
 if(up($_)) {
   system "console .........";
   exit 0;
 }
}

die "All connections attempts to the console servers have failed!\n";



On Fri, 2007-08-10 at 10:58 -0700, Bryan Stansell wrote:
> On Thu, Aug 09, 2007 at 02:54:49PM -0400, John Stoffel wrote:
> > So aside from setting up multiple master servers, one for each site,
> > how can I setup things so that I have a master and a standby server,
> > so that if the master goes down, all the clients know to talk to the
> > standby box, which picks up the session(s) dropped by the master.
> 
> There isn't anything internally to support that setup.  You can
> certainly just have a copy of the conserver.cf file on another host
> (which has access to everything) and turn up conserver there if/when
> necessary.  To make it even fancier, you could have a process test
> connections to the main conserver host to auto-detect when it goes down
> and then fire things up automatically.  And I suppose you could even
> make the startup sequence on the main server go to the backup and
> shutdown any existing conserver processes, so that it can take back
> control.
> 
> You've probably thought of all this...unfortunately I don't have any
> other bright ideas.
> 
> As for the client issue, if you can swing a dns name quickly, you'd be
> good.  Or you create a wrapper for the console command that first tries
> the master, and if it fails, tries the backup.  Again, nothing internal
> to help you out, but it seems doable.
> 
> Bryan
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